Thursday 24 April 2014
News updated at 9:55 PM IST
Weather
Max: 34.6°C
Min : 22.8°C
In Bangalore
Generally cloudy

Navel has bacterias similar to those found in rainforest

London, Nov 16, 2012, PTI:

 Navels harbour an ecosystem of bacteria which is similar in their biodiversity to the world’s rainforests, a new study has claimed. US researchers found 2,368 species of bacteria, 1,458 of which may be new to science, after two years of literal navel gazing.

Just eight of these species were found in more than 70 per cent of individuals sampled. However, questions remain as to what factors govern which species will be found on which people, the Daily Mail reported. “The common, abundant species are from a relatively small number of evolutionary lines, indicating that they have evolved traits that make them at home on human skin,” said Rob Dunn of North Carolina State University.

“However, we are still trying to figure out what determines which of these species are found in a given person’s belly button,” Dunn said.


“We’ve looked at sex, age, ethnicity and a number of other factors — none of them are predictive of which species live in that person,” Dunn added.

Dunn and his team swabbed more than 500 belly buttons over the past two years, but concentrate on just 60 individuals for their study published in the journal PLoS One.

The researchers launched their project in part to investigate claims over recent years that the collection of organisms on human skin forms our first line of defence against pathogens. “We know that without these microbes our immune systems won’t function properly,” Dunn said.

“In fact, this collection of microbes must have a certain composition — must form a certain microbial ecosystem — in order for our immune system to function properly,” Dunn added. The study identified 2,368 different phylotypes but only eight phylotypes - which the team dubbed ‘oligarchs’ - were found on at least 70 per cent of the study participants.

Those eight phylotypes - including varieties of Staphylococci, Corynebacteria, Actinobacteria, and Clostridiales, and Bacilli - were also among the most abundant, accounting for almost 50 per cent of the total abundance of bacteria in the samples.
Altogether, the researchers found that the average bellybutton among study participants contains 67 different phylotypes of bacteria.

“That makes the belly button a lot like rain forests,” Dunn told the National Geographic.
He explained that in any rainforest the range of flora will vary but scientists can count on a certain few dominant tree types present. “The idea that some aspects of our bodies are like a rain forest—to me it’s quite beautiful. I understand what steps to take next; I can see how that works,” he said.

Go to Top

Photo Gallery
A fan offers sweet to a poster of Sachin Tendulkar on his 41st birthday, in Bikaner on Thursday...

A fan offers sweet to a poster of Sachin Tendulkar on his 41st birthday, in Bikaner on Thursday...

A physically challenged boy shows his voter identity card after casting vote for the Lok Sabha...

A physically challenged boy shows his voter identity card after casting vote for the Lok Sabha...

Elderly women outside a polling booth before casting their votes in Malda, West Bengal on ...

Elderly women outside a polling booth before casting their votes in Malda, West Bengal on ...

Voters show their identity cards as they wait to cast votes for Lok Sabha elections at a village...

Voters show their identity cards as they wait to cast votes for Lok Sabha elections at a village...

Bollywood actor Shah Rukh Khan displays the indelible ink mark on his finger after casting his ...

Bollywood actor Shah Rukh Khan displays the indelible ink mark on his finger after casting his ...

Catholic nuns show their inked finger after casting their vote for the Lok Sabha polls in ...

Catholic nuns show their inked finger after casting their vote for the Lok Sabha polls in ...

Malayalam film actor Mammootty presents a memento to prominent Malayalam writer and Janapith ...

Malayalam film actor Mammootty presents a memento to prominent Malayalam writer and Janapith ...

Women voters show their voter identity cards as they wait in queues to cast votes for Lok Sabha ...

Women voters show their voter identity cards as they wait in queues to cast votes for Lok Sabha ...

Bollywood legend Amitabh Bachchan, his wife Jaya Bachchan,  son Abhishek Bachchan, and daughter...

Bollywood legend Amitabh Bachchan, his wife Jaya Bachchan, son Abhishek Bachchan, and daughter...

Industrialist Mukesh Ambani with wife Nita Ambani and sons showing ink marked fingers after ...

Industrialist Mukesh Ambani with wife Nita Ambani and sons showing ink marked fingers after ...

Copyright 2014, The Printers (Mysore) Private Ltd., 75, M.G Road, Post Box 5331, Bangalore - 560001
Tel: +91 (80) 25880000 Fax No. +91 (80) 25880523